package com.sky.service.impl;

import cn.hutool.core.collection.CollUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
//import com.sun.org.apache.bcel.internal.generic.NEW;
import com.sky.vo.OrderVO;
//import com.sun.org.apache.bcel.internal.generic.NEW;
import com.sky.websocket.WebSocketServer;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;

/**
 * ClassName: OrderServiceImpl
 * Package: com.sky.service.impl
 * Description:
 *
 * @Auther gongkaiming
 * @Create 2024/10/19 9:21
 * @Version 1.0
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    private Orders orders;

    @Autowired
    private WebSocketServer webSocketServer;

//    @Value("${sky.shop.address}")
//    private String shopAddress;
//
//    @Value("${sky.baidu.ak}")
//    private String ak;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        // 1.处理各种业务异常
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (Objects.isNull(addressBook)) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 检查用户收货地址是否超出配送范围
//        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if (CollUtil.isEmpty(shoppingCartList)) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        // 2. 向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        this.orders = orders;
        orderMapper.insert(orders);
        // 3. 像订单明细表插入n条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();        // 订单明细表
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());     // 设置当前订单明细表关联的订单ID
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        // 4.清空当前购物车数据
        shoppingCartMapper.deleteByUserId(userId);
        // 5.封装VO对象返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }

    /**
     * 检查用户收货地址是否超出配送范围
     *
     * @param address
     */

    /*
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address", shopAddress);
        map.put("output", "json");
        map.put("ak", ak);

        // 获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);
        JSONObject json = JSON.parseObject(shopCoordinate);
        if (!json.getString("status").equals(0)) {
            throw new OrderBusinessException(MessageConstant.SHOP_ADDRESS_ERROR);
        }

        // 数据解析
        JSONObject location = json.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");

        // 店铺的经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address", address);

        // 获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);
        json = JSON.parseObject(userCoordinate);
        if (!json.getString("status").equals("0")) {
            throw new AddressBookBusinessException(MessageConstant.SHOP_ADDRESS_ERROR);
        }

        // 数据解析
        location = json.getJSONObject("result").getJSONObject("location");
        location.getString("lat");
        location.getString("lng");

        // 用户收货地址经纬度坐标
        String userLatLng = lat + "," + lng;

        map.put("origin", shopLngLat);
        map.put("destination", userLatLng);
        map.put("steps_info", "0");

        // 路线规划
        String jsonProject = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        json = JSON.parseObject(jsonProject);

        if (!json.getString("status").equals("0")) {
            throw new AddressBookBusinessException(MessageConstant.SHOP_ADDRESS_ERROR);
        }

        // 数据解析
        JSONObject result = json.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");

        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");
        if (distance > 5000) {
            // 配送范围超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
    */

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

/*        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }
*/
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        Integer orderStatus = Orders.TO_BE_CONFIRMED;   // 订单状态
        Integer orderPaidStatus = Orders.PAID;          // 支付状态，已支付
        LocalDateTime check_out_time = LocalDateTime.now();     // 更新支付时间
        orderMapper.updateStatus(orderStatus, orderPaidStatus, check_out_time, this.orders.getId());
//        orderMapper.updateStatus(orderStatus, orderPaidStatus, check_out_time, Long.valueOf(ordersPaymentDTO.getOrderNumber()));
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));

        // 通过websocket向客户端浏览器推送消息
        Map map = new HashMap();
        map.put("type", 1);     // 1 表示来单提醒 2 表示客户催单
        map.put("orderId", this.orders.getId());

        map.put("content", "订单号：" + this.orders.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        Long userId = BaseContext.getCurrentId();
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 历史订单查询
     *
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */

    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 条件分页查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        // 查询到订单明细，封装到OrderVO中响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 根据Id查询订单详情
     *
     * @param id
     * @return
     */
    public OrderVO details(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);

        // 查询订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将该订单及其详情封装到OrderVO中
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 取消订单
     *
     * @param id
     * @throws Exception
     */
    public void userCancelById(Long id) throws Exception {
        // 根据ID查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (Objects.isNull(ordersDB)) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            // 调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01)
//            );

            // 支付状态修改为退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    /**
     * 再来一单
     *
     * @param id
     */
    public void repetition(Long id) {
        // 根据id查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据用户id查询订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 订单详情对象转为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(orderDetail -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里的菜品信息重新复制到购物车中
            BeanUtils.copyProperties(orderDetail, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象添加到数据库中
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将orders 转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {

        // 根据状态，分别查出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVC响应中
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {

        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2(待接单)才能拒单
        if (Objects.isNull(ordersDB) || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (Objects.equals(payStatus, Orders.PAID)) {
            // 用户已支付，需退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01)
//            );
//            log.info("申请退款: {}", refund);
        }

        // 拒单退款，根据订单id更新订单状态、退款原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        // 判断订单是否存在
        if (Objects.isNull(ordersDB)) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 支付状态
        Integer payStatus = ordersDB.getStatus();
        if (1 == payStatus) {
            // 用户支付，则需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01)
//            );
//            log.info("申请退款：{}", refund);
        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、退款原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(ordersDB.getStatus());
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    public void delivery(Long id) {

        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 检查订单是否存在，且状态是否为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 更新订单状态为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {

        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        if (ordersDB == null || ordersDB.getStatus().equals(Orders.COMPLETED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新状态、时间,完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 客户催单
     *
     * @param id
     */
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        if (Objects.isNull(ordersDB)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap();
        map.put("type", 2);
        map.put("orderId", id);
        map.put("content", "订单号" + ordersDB.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }


    public List<OrderVO> getOrderVOList(Page<Orders> page) {

        // 返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (CollUtil.isNotEmpty(ordersList)) {
//            for (Orders orders : ordersList) {
//                // 将共同字段复制到OrderVO
//                OrderVO orderVO = new OrderVO();
//                BeanUtils.copyProperties(orders, orderVO);
//                String orderDishes = getOrderDishesStr(orders);
//
//                // 将订单菜品信息封装到orderVO, 并添加到orderVOList
//                orderVO.setOrderDishes(orderDishes);
//                orderVOList.add(orderVO);
//            }

            orderVOList = ordersList.stream().map(order -> {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order, orderVO);
                String orderDishes = getOrderDishesStr(order);
                // 将订单菜品信息封装到orderVO, 并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                return orderVO;
            }).toList();
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    public String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详细信息(订单中的菜品和数量)
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串(格式为：宫保鸡丁*3)
        List<String> orderDishList = orderDetailList.stream()
                .map(orderDetail -> orderDetail.getName() + "*" + orderDetail.getNumber() + ";").collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

}
